package com.wang.designpattern.responsibilitychain;

import org.apache.commons.lang3.time.DateFormatUtils;

import java.lang.management.ManagementFactory;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

/**
 * 时间工具类
 * 
 * @author ruoyi
 */
public class DateUtils
{
    public static String YYYY = "yyyy";

    public static String YYYY_MM = "yyyy-MM";

    public static String YYYY_MM_DD = "yyyy-MM-dd";

    public static String YYYYMMDDHHMMSS = "yyyyMMddHHmmss";

    public static String YYYY_MM_DD_HH_MM_SS = "yyyy-MM-dd HH:mm:ss";
    
    private static String[] parsePatterns = {
            "yyyy-MM-dd", "yyyy-MM-dd HH:mm:ss", "yyyy-MM-dd HH:mm", "yyyy-MM", 
            "yyyy/MM/dd", "yyyy/MM/dd HH:mm:ss", "yyyy/MM/dd HH:mm", "yyyy/MM",
            "yyyy.MM.dd", "yyyy.MM.dd HH:mm:ss", "yyyy.MM.dd HH:mm", "yyyy.MM"};

    /**
     * 获取当前Date型日期
     * 
     * @return Date() 当前日期
     */
    public static Date getNowDate()
    {
        return new Date();
    }

    /**
     * 获取当前日期, 默认格式为yyyy-MM-dd
     * 
     * @return String
     */
    public static String getDate()
    {
        return dateTimeNow(YYYY_MM_DD);
    }

    public static final String getTime()
    {
        return dateTimeNow(YYYY_MM_DD_HH_MM_SS);
    }

    public static final String dateTimeNow()
    {
        return dateTimeNow(YYYYMMDDHHMMSS);
    }

    public static final String dateTimeNow(final String format)
    {
        return parseDateToStr(format, new Date());
    }

    public static final String dateTime(final Date date)
    {
        return parseDateToStr(YYYY_MM_DD, date);
    }

    public static final String parseDateToStr(final String format, final Date date)
    {
        return new SimpleDateFormat(format).format(date);
    }

    public static final Date dateTime(final String format, final String ts)
    {
        try
        {
            return new SimpleDateFormat(format).parse(ts);
        }
        catch (ParseException e)
        {
            throw new RuntimeException(e);
        }
    }

    /**
     * 日期路径 即年/月/日 如2018/08/08
     */
    public static final String datePath()
    {
        Date now = new Date();
        return DateFormatUtils.format(now, "yyyy/MM/dd");
    }

    /**
     * 日期路径 即年/月/日 如20180808
     */
    public static final String dateTime()
    {
        Date now = new Date();
        return DateFormatUtils.format(now, "yyyyMMdd");
    }

    /**
     * 获取服务器启动时间
     */
    public static Date getServerStartDate()
    {
        long time = ManagementFactory.getRuntimeMXBean().getStartTime();
        return new Date(time);
    }

    /**
     * 计算两个时间差
     */
    public static String getDatePoor(Date endDate, Date nowDate)
    {
        long nd = 1000 * 24 * 60 * 60;
        long nh = 1000 * 60 * 60;
        long nm = 1000 * 60;
        // long ns = 1000;
        // 获得两个时间的毫秒时间差异
        long diff = endDate.getTime() - nowDate.getTime();
        // 计算差多少天
        long day = diff / nd;
        // 计算差多少小时
        long hour = diff % nd / nh;
        // 计算差多少分钟
        long min = diff % nd % nh / nm;
        // 计算差多少秒//输出结果
        // long sec = diff % nd % nh % nm / ns;
        return day + "天" + hour + "小时" + min + "分钟";
    }

    /**
     * 根据过期时间，计算剩余大概时间
     * @param expireTime
     * @return
     */
    public static String getRemainTime(Date expireTime) {
        String result = "已过期";
        // 短    <30分钟
        long shortTime = 0;
        // 中    30-2小时
        long middleTime = 30 * 60 * 1000;
        // 长    2小时-6小时
        long longTime = 2 * 60 * 60 * 1000;
        // 很长   6小时-12小时
        long longgerTime = 6 * 60 * 60 * 1000;
        // 非常长  12小时-24小时
        long longgestTime = 12 * 60 * 60 * 1000;

        // 获得两个时间的毫秒时间差异
        long diff = expireTime.getTime() - getNowDate().getTime();
        if (diff > 0) {
            if (diff > longgestTime) {
                result = "非常长";
            } else if (diff > longgerTime) {
                result = "很长";
            } else if (diff > longTime) {
                result = "长";
            } else if (diff > middleTime) {
                result = "中";
            } else {
                result = "短";
            }
        }
        return result;
    }
    /**
     * 根据初始时间和增加小时数，计算增加后的时间
     * @param initDate
     * @param addHours
     * @return
     */
    public static Date getAddTime(Date initDate, Integer addHours) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(initDate);
        calendar.add(Calendar.HOUR, addHours);
        return calendar.getTime();
    }

    public static Date dateAndTime(String dateStr, String timeStr) {
        try
        {
            return new SimpleDateFormat("yyyy-MM-dd HH:mm").parse(dateStr + " " + timeStr);
        }
        catch (ParseException e)
        {
            throw new RuntimeException(e);
        }
    }

    public static long calcTime(Date date, String startTimeStr, String endTimeStr) {
        String dateStr = dateTime(date);
        Date startTime = dateAndTime(dateStr, startTimeStr);
        Date endTime = dateAndTime(dateStr, endTimeStr);
        long nm = 1000 * 60;
        // 获得两个时间的毫秒时间差异
        long diff = startTime.getTime() - endTime.getTime();
        // 计算差多少分钟
        long min = diff / nm;
        return min;
    }
}
